What powers retrochallenge.org?
Last seen Nov 2022 · 6 technologies across 5 categories
Advertising
Google AdSense
since Nov 2022
Blogs
Blogger
since Nov 2022
Miscellaneous
Open Graph
since Nov 2022
Programming languages
Web servers
OpenGSE
since Nov 2022
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Open Page Rank
3.12 / 10 · ranked #1,389,528 of all domains
30 referring domains · OpenPageRank
Infrastructure
- Hosted on FASTMAILPTYLTD-AS-AP Fastmail Pty Ltd (103.168.172.37)
- DNS: Fastmail
- Email: Fastmail
- Email security: SPF (neutral), DMARC monitor only
- SSL: Google Trust Services, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 2,656,116, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted